How does an Indiglo watch work? - podcast episode cover

How does an Indiglo watch work?

May 28, 20133 min
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Episode description

An Indiglo watch works a lot like a neon sign, getting its signature "glow" from electroluminescence. Tune in to hear Marshall Brain explain the finer points of Indiglo watch technology in this podcast from HowStuffWorks.com.

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Transcript

Speaker 1

Jack Threads is the online shopping destination for dudes. Everything on the side is up to eight off. All styles are curated, so buyer's remorse just doesn't happen. What's more is if you were brain stuff, you can skip the membership wait list and get instant access at jack threads dot com, slash Stuff Welcome to Brainstuff front house, stuff works dot com Where smart Happens. Hi, I'm Marshall Brain with today's question. How does an indo glow watch work.

The basic technology behind the indo glow watch is called electroluminescence. Electroluminescence is the conversion of electricity directly into light. This is not how an incandescent ball works. In an incandescent ball, the electricity produces heat and the heat produces light. Electroluminescence is much more efficient because it converts the electricity directly to light. The most common example of electro luminescence that we see on a regular basis is a neon sign.

In a neon sign, high voltage energizes the electrons and the neon atoms and they emit photons. In an indiglow watch, a very thin panel uses high voltage to energize phosphor atoms that produced the light. The panel itself is incredibly simple, as described in the time x patent. You take a thin glass or plastic layer, you coat it with a clear conductor. You coat that conductor with a very thin layer of phosphor. You coat the phosphor with a thin

plastic and then you add another electrode. Essentially, what you have is two conductors or a capacitor with phosphor in between. When you apply one D two hundred volts a C to the conductors, the phosphor energizes and it begins emitting photons. Creating that high voltage can be a problem in a wrist watch. The watch only has this little one point

five volt battery inside it. To produce the one two hundred volts, a one to one hundred transformer is used by charging the primary coil of the transformer with a transistor that's switching on and off very rapidly. The secondary coil rises to a hundred fifty volts or so. You apply that to the panel and the panel starts to glow. For more on this and thousands of other topics. Because it how staff works, dot com Jack threads is the

online shopping destination for dudes. Everything on the side is up to off, all styles are curated, so buyer's remorse just doesn't happen. What's more is if you were brain Stuff, you can skip the membership wait list and get instant access at jack threads dot com slash stuff

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